Validatable is a library for adding validations.

An object that works with form_for that encapsulates validations and data management, leaving the business logic up to your testable old self.

Easy client side validation for your ActiveRecord models

FlowChat is a Rails framework for building sophisticated conversational interfaces across USSD and WhatsApp platforms. Create interactive flows with menus, prompts, validation, media support, and session management. Features include multi-tenancy, background job processing, built-in simulator f...

Validation and helper methods for string based enums in rails

JSON schema validation for Rails

RFC822 compatible email validation and MX record check

Settler can be used for defining application wide settings in Rails. Settings are loaded from a YAML file and stored in the database using ActiveRecord to allow users to update settings on the fly. The YAML configuration allows you to not only specify defaults, but setting value validations and t...

Data structures, validation, coercion and processing toolkit for Ruby

ActiveRecord Tablefree Models provides a simple mixin for creating models that are not bound to the database. This approach is useful for taking advantage of the features of ActiveRecord such as validation, relationships, nested_attributes, etc.

ISO Schematron Validation

Provides a form field validation JavaScript library for your Rails application. Built for use with jQuery and Twitter Bootstrap 3. Source code: https://github.com/nghuuphuoc/bootstrapvalidator

Like Active Record's validation feature, but for destroying models

A captcha verification approach for Rails apps, directly integrated into ActiveRecord’s validation mechanism and providing helpers for ActionController and ActionView.

A Ruby library for credit card BIN validation and brand identification

Generation, parsing, and validation of Instructure access tokens

Create models that are not bound to the database and take advantage of the ActiveRecord features, such as validation, relationships, etc.

Used to validate ContentData objects.

DataValidator has almost active_recorde validation methods.

ActiveModel validations for domains (including TLDs), ip addresses and email addresses with fully localization support.